First a little back story.......
I have a stock appearing.... highly modified 69 CJ5 running an odd fire Buick V6.
I am currently running a Howell "fuel only" TBI system.
The system does run pretty good but I feel like there is some room for improvement. The Howell setup is running off the tach output on the HEI through a proprietary tach filter. The tach filter is supposed to even out the erratic signal from the odd fire signal. I'm on my second "Special Howell filter" and second distributor. When hooked to the scanner up to the ALDL connector I can see that the computer is receiving an inconsistent rpm signal. The signal reading will bounce in a range from 550-975 at idle, off idle it maybe bounces 100-200 rpm.

The current setup uses:
4.3 TBI and injectors
GM 1227747 ECM with custom chip
Heated 4 wire 02 sensor
HEI ignition
Rpm signal to ecm via tach output on HEI

I am looking to install 3 metal nodes on the harmonic balancer and a sensor to provide a solid rpm signal.

Can I use this sensor with the stock gm computer to provide the rpm signal?
https://www.diyautotune.com/product/...sition-sensor/

Here are a couple pictures of my jeep.